2ef747938e444f4f9a78d18bd11dde62a922abb63929a612a02d6c5eb86897d1

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
21-05-2024 19:42

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General

Target

2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe
Size

38KB
MD5

e56d1308a325632c3312c92279b6b812
SHA1

8750d1344fb2aaaff8d941792fcb865c8a6fab1b
SHA256

2ef747938e444f4f9a78d18bd11dde62a922abb63929a612a02d6c5eb86897d1
SHA512

fec3770c44fe2db030efb30f57510002fed72c2d45ab543edb4367b5875a84f217b5879a2524a8016577a9c0f4f32709f2535ffb48955d8300512f0f923e6d22
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYaBsaUC:qDdFJy3QMOtEvwDpjjWMl7TdaC

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/816-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/816-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/816-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/816-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/816-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/816-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4748-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

4748 asih.exe

pid	process
4748	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/816-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/816-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4748-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe

description	pid	process	target process
PID 816 wrote to memory of 4748	816	2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe	asih.exe
PID 816 wrote to memory of 4748	816	2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe	asih.exe
PID 816 wrote to memory of 4748	816	2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-21_e56d1308a325632c3312c92279b6b812_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:816
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
38KB

MD5
54a5b3fba087158fbc1f815eaf4ba974

SHA1
e89b4f56f68c550b1b9a85a1a1d11e5d8b80e453

SHA256
048a06fdf96536b8fceeb5dc31bace288d0bff21733c61e01b9544e5b9acb738

SHA512
9ca9cc450a864bb62143b61ae154b1ab7b2fbfb6fa2ca8529bc8c066d96172c2bb1fc8bf93052b9b921db03f4aeb7e93d0c8ced49b3a2d21590ac6d4e831802a

Download Submit
memory/816-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/816-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/816-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/816-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/816-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4748-20-0x0000000000860000-0x0000000000866000-memory.dmp

Filesize
24KB

Download
memory/4748-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download